Chuck



A. E. SHARPLES June 30, 1925.

CHUCK Filed June 18, 1923 Patented June 30, 1925.

UNITED STATES PATENT OFFICE.

ARTHURE. 'SHAR-ILES, or raovrnnucs, anona ISLAND.

CHUCK.

' To all whom it may concern:

Be it known'that I, ARTHUR E. SHARPLES, a citizen of the UnitedStat-es, residing at Providence, in the county of Providence and State of Rhode Island,.have invented certain new and useful Improvements in Chucks, of which the following is a specification. f

This invention relates to an improved construction of combined work chuck and tool guide: and has for its object to provide a chuck in which work may be held while being operated upon by a drill, punch or other tool, the chuck being provided with a plurality of clamping j aws operable upon the base of the chuck in combination with a tool-guide for supporting and directing the tool while operating upon the work.

A further object of this invention is the provision of a clamp mounted upon the "tool supporting member of the chuck to assist in binding the work in position while being operated upon. I

A still further object of the invention is the provision of removable bushings both in the tool-guide and also in the base whereby tools of different sizes may be accurately guided above the work and the bushings in the base which may be interchangeable to cooperate with the tools of different sizes and characters.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claim.

In the accompanying drawings:

Figure 1 is a plan view of my improved chuck unit.

Figure 2 is a sectional elevation on line 2-2 of Figure 3.

Figure 3 is a detail of the clamping member adapted to engage the upper surface of the work.

Figures 4; and 5 show removable bushings which may serve to support the tool while working, or providing an opening in the base into which the cuttingend of the tool may project.

Figure 6 is an enlarged sectional view on line 66 of Figure 1, showing the groove in the base, and the guide pin in the work clamping jaw.

It is found in the practical operation of chucks, or adjustable igs, in which work is held while being operated upon in such ma- Application filed June 18, 192.3. Serial No. 646,087.

. chines as hand-operated drills, or other machines, desirable to be able to position and clamp the work onto the base of the chuck and to also provide a guide for the tool above the work whereby a prick-punch may be first inserted to mark the work and then removed with its bushing and an operating tool with a bushing of a larger size positioned to guide the tool while operating upon the work. It is also found of advantage to be able to provide a bushing in the base of the chuck having an opening of the required diameter whereby the drill or tool upon being passed throughthe work, may be received into this opening in the base. It is also found of advantage to so mount the clamping jaws upon the base that they may be adjusted either radially, to and from the center of the chuck, or on lines at an angle to these radial lines, whereby work of different shapes may be engaged and properly retained in the chuck; and the following-is a detailed description'of one means by which these advantageous results may be obtained lVith reference to the drawings, 10 designates the base of a chuck which may be of any suitable thickness and of any suitable shape. In the face of this base member, I have formed a set of grooves 11 and 9, the former being arranged in a square about the center of the chuck, while the set 9 is shown as radially arranged to extend outwardly from the center of the chuck to the corners of the square groove and at each corner in this double set of grooves, I have provided a binding bolt 12 for the clamping jaws 13 which are mounted to slide upon the face of the chuck. Each of these clamping aws is slotted longitudinally as at 14 through which slot the binding bolt 12 passes, and each of these clamping jaws as shown as being provided with a guide pin or projection 15 which may engage either of the grooves 9 or 11 whereby the jaws may be slid or adjusted radially towards and from the center of the chuck or at an angle to these radial grooves to engage work of various shapes. On the base of this chuck, I have formed a bridge member 16 which extends across from side to side above the center of the chuck and raised a substantial distance above the face of the same. In the center of this bridge member, I have formed an opening 17 which is adapted to receive bushings 18 of different sizes and which may be secured therein by a binding screw 19w These bushings may vary in diameters to suit reguirements, in some tease-s. they arev provided with ahole of a diameter to receive and guide a priclnpunch 20, andefter the work has been operated upon by the prick-punch, this puneh-wvith its bushings': may be removed and a bushing of thedesired" size positioned"tofireceive and guide ing as a hanclle anchboundlin' adjusted posi' -t-ion-by screws 25 to firmly clamp the work in position while being operated upon by the tool.

My improved work chuck is extremely simple and practical in its operation and by1itssnuseyworkl may be set and firmly clamped in position and then the chuck placed in adrillingmachine iorotheinmnfthedrill, or tool (not *shown) wvhichunay' the passed therethrou-ghto begu'idedwhile operating upon the -work 'clamp upon the befdqfiete. j V V his bed-plate isprovidedwitha central opening21"-intow=hich e bushing 22 may be chine} to hold: the: work while being: operated upon by the tdolith'erein. l

"The foregoing description iswidirected -12 solely towardslthe" construction illustrated, but 'll desire it to be'un'derstood that-I rese'rve thepriv-ilegebf resorting to'iall the positioned, the same being in some instances of a size'to permit the drill --which operates upon firework to pass therethrough, =whileill"0tl18l cases er-solid plug may "be placed therein 1 fo'r' i the purpose of supporting the center iii: the work-"if desired, 'or in--=still other'cases die may beplaced: in this openmg to' cooperate w1th 1a punch Whi ch -may *Insomeinstances, I-have' found it desirfable to" provide a, :claunping'member- 23 to "operate independentlyof the clamping j aws to assist 'in bind g the work I in position,

i whieh *lneinbei-"may "be formed in "-U-shape, a

as shown in Figures 3 the seinehaying its arms "slotted' as'fat 2tto' -be manuallyad justed'vert-icallyby means of apin80 servmechanical changes to which the device is siisceptible, the invention beingdefined and hmite'd only byithe termsot the appended whim;

Ilclirim:

Airworkichuck comprising-a base, a :rectzxrrgularly; shaped groove therein, oppositely disposed diagonal .grooves also iirsaid base x joining: sai d l rectangular groove, a p11 urality 

